当日: on the day

sometimes / (literary) at that time

久しく: for a long time

perfect, spot on

relaxing

every night

(Internet slang) quickly; now

again and again; repeatedly; once again

evocative of something light or fragile falling gently in a wafting or fluttering fashion / evocative of a single tear falling from one's eyes / evocative of moving one's body gently or stepping lightly

自ずから: by itself, naturally, on its own